From e5f6819b6d0ea5e8db7d34b2a45b118c40697066 Mon Sep 17 00:00:00 2001
From: AoiKamishiro <aoi.kamishiro@kamishiro.online>
Date: Mon, 30 Jun 2025 01:14:07 +0900
Subject: [PATCH] =?UTF-8?q?BlittableSpring=E3=81=AE=E6=9C=80=E9=81=A9?=
 =?UTF-8?q?=E5=8C=96?=
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---
 .../Blittables/BlittableSpring.cs             | 21 +++++++++++++------
 .../FastSpringBoneConbinedBuffer.cs           | 11 +++++-----
 .../InputPorts/FastSpringBoneBuffer.cs        | 10 ++++-----
 3 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpring.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpring.cs
index c4de2b291..f98d231d0 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpring.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpring.cs
@@ -7,12 +7,21 @@ namespace UniGLTF.SpringBoneJobs.Blittables
     /// FastSpringBoneではこれを起点として並列化し、処理を行う
     /// </summary>
     [Serializable]
-    public struct BlittableSpring
+    public readonly struct BlittableSpring
     {
-        public BlittableSpan colliderSpan;
-        public BlittableSpan logicSpan;
-        public int centerTransformIndex;
-        public int transformIndexOffset;
-        public int modelIndex;
+        public readonly BlittableSpan colliderSpan;
+        public readonly BlittableSpan logicSpan;
+        public readonly int centerTransformIndex;
+        public readonly int transformIndexOffset;
+        public readonly int modelIndex;
+        
+        public BlittableSpring(BlittableSpan colliderSpan = default, BlittableSpan logicSpan = default, int centerTransformIndex = 0, int transformIndexOffset = 0, int modelIndex = 0)
+        {
+            this.colliderSpan = colliderSpan;
+            this.logicSpan = logicSpan;
+            this.centerTransformIndex = centerTransformIndex;
+            this.transformIndexOffset = transformIndexOffset;
+            this.modelIndex = modelIndex;
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
index fb65bc910..efc722c8a 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
@@ -248,11 +248,12 @@ namespace UniGLTF.SpringBoneJobs
             public void Execute(int index)
             {
                 var spring = SrcSprings[index];
-                spring.modelIndex = ModelIndex;
-                spring.colliderSpan = new BlittableSpan(spring.colliderSpan.startIndex + CollidersOffset, spring.colliderSpan.count);
-                spring.logicSpan = new BlittableSpan(spring.logicSpan.startIndex + LogicsOffset, spring.logicSpan.count);
-                spring.transformIndexOffset = TransformOffset;
-                DestSprings[index] = spring;
+                DestSprings[index] = new BlittableSpring(
+                    modelIndex: ModelIndex,
+                    colliderSpan: new BlittableSpan(spring.colliderSpan.startIndex + CollidersOffset, spring.colliderSpan.count),
+                    logicSpan: new BlittableSpan(spring.logicSpan.startIndex + LogicsOffset, spring.logicSpan.count),
+                    transformIndexOffset: TransformOffset,
+                    centerTransformIndex: spring.centerTransformIndex);
             }
         }
 
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/InputPorts/FastSpringBoneBuffer.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/InputPorts/FastSpringBoneBuffer.cs
index 3c0fddec4..617c993f0 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/InputPorts/FastSpringBoneBuffer.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/InputPorts/FastSpringBoneBuffer.cs
@@ -67,12 +67,10 @@ namespace UniGLTF.SpringBoneJobs.InputPorts
             List<BlittableJointImmutable> blittableLogics = new();
             foreach (var spring in springs)
             {
-                var blittableSpring = new BlittableSpring
-                {
-                    colliderSpan = new BlittableSpan(blittableColliders.Count,spring.colliders.Length),
-                    logicSpan = new BlittableSpan(blittableJoints.Count, spring.joints.Length - 1),
-                    centerTransformIndex = Array.IndexOf(Transforms, spring.center),
-                };
+                var blittableSpring = new BlittableSpring(
+                    centerTransformIndex: Array.IndexOf(Transforms, spring.center),
+                    colliderSpan: new BlittableSpan(blittableColliders.Count, spring.colliders.Length),
+                    logicSpan: new BlittableSpan(blittableJoints.Count, spring.joints.Length - 1));
                 blittableSprings.Add(blittableSpring);
 
                 blittableColliders.AddRange(spring.colliders.Select(collider =>